Hioki 8835-01 - Level Trigger Operation

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7.9 Making the Settings of the 8947 CHARGE UNIT
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Sensor sensitivity value
Sensor sensitivity set for the 8947 CHARGE UNIT is determined as value per
m/s
2
. For value per G determined acceleration sensors, adjust sensor
sensitivity value by dividing by 9.8 (m/s
2
).
Example 1
When sensor sensitivity 1.08 (pC/(m/s
2
)) is noted, adjust setting value to 1.08.
Example 2
When sensor sensitivity 64.0 (pC/G) is noted,
64.0/9.8 = 6.53 (pC/(m/s
2
))
adjust setting value to 6.53.
Units
The 8947 CHARGE UNIT measures electrical charge per m/s
2
.
Scaling function converts measurement into value per G.
Configure scaling settings as below.
[Conversion ratio scaling]
EU/V: 1/9.8 = 0.1020E+00
Offset: 0.0000E+00
EU: G
[2-point scaling]
9.8000E+00 → 1.0000E+00
0.0000E+00 → 0.0000E+00
EU: G
For detais of of the scaling function, see Section 9.4.
Using sensor outside setting range
Sensor sensitivity setting range is between 0.1 to 10 (pC/(m/s
2
)), 0.1 to 10
(mV/(m/s
2
)). Scaling allows use of sensor outside setting range.
Method Screen: CHANNEL 1 → SCALING (SYSTEM 3)
1. Display CHANNEL 1 screen and set sensor sensitivity. Multiply sensor
sensitivity by appropriate number to determine value for setting.
2. Display SCALING screen and specify out-of-range sensor channel to either
SCI or ENG.
3. Set conversion ratio at the same value as the number for multiplying sensor
sensitivity.
(Example 1) When sensor sensitivity is 23.4 (pC/(m/s
2
))
Multiply value by 1/2.34 and take 10 (pC/(m/s
2
)) as sensor sensitivity value as
setting.
Configure scaling.
[Conversion ratio scaling]
EU/V: 10/23.4 = 0.4274E+00
Offset: 0.0000E+00
EU: m/s
2
[2-point scaling]
2.3400E+01 → 1.0000E+01
0.0000E+00 → 0.0000E+00
EU: m/s
2